Purchase Solution

Regression Line and R2

Not what you're looking for?

Ask Custom Question

1. Consider the following data table. Compute the regression line if z on x.

z 50 67 70 90 95 101
x 3 4 7 10 12 13

2. Consider the following data table which consists of the data from problem 1 and a second set. Compute the regression line of z on x and y. How much has the adjusted R2 increased from problem 1?
z 50 67 70 90 95 101
x 3 4 7 10 12 13
y 16 11 9 7 6 2

Purchase this Solution
Solution Summary

Attached in Word and Excel, this solution provides the regression lines on one and two variables and talks about the increase in R2.

Solution Preview

Please see the attachments.

Statistics
1. Consider the following data table. Compute the regression line if z on x.

z 50 67 70 90 95 101
x 3 4 7 10 12 13

Regression Analysis

r² 0.948 n 6
r 0.973 k 1
Std. Error 5.027 Dep. Var. Z

ANOVA table
Source SS df MS F p-value
Regression 1,825.7585 1 1,825.7585 72.25 .0011
Residual 101.0749 4 25.2687
Total 1,926.8333 ...

Purchase this Solution
Free BrainMass Quizzes
Measures of Central Tendency

Tests knowledge of the three main measures of central tendency, including some simple calculation questions.

Measures of Central Tendency

This quiz evaluates the students understanding of the measures of central tendency seen in statistics. This quiz is specifically designed to incorporate the measures of central tendency as they relate to psychological research.

Terms and Definitions for Statistics

This quiz covers basic terms and definitions of statistics.

Know Your Statistical Concepts

Each question is a choice-summary multiple choice question that presents you with a statistical concept and then 4 numbered statements. You must decide which (if any) of the numbered statements is/are true as they relate to the statistical concept.

View More Free Quizzes
Related BrainMass Solutions

  • Least squares regression line

    Regression analysis was applied between sales in ($1000) and advertising(in $100), and the following regression function was obtained: Y = 61 +4.1X Based on this regression line, if advertising is $10,000, the point estimate for sales (in dollars) is

  • Multiple regression analysis

    In regression, the R2 coefficient of determination is a statistical measure of how well the regression line approximates the real data points. An R2 of 1.0 indicates that the regression line perfectly fits the data.

  • Regression Line Relating the Percentage to Number of Variables

    1.4 What does R2 mean in Question 1.3? 1.5 What is s2y.x ? 1.6 Test for the statistical significance of the regression line using the T test. 1.7 What are the standard errors of the slope and intercept for the regression line in 1.1?

  • Regression analysis

    What is Regression Line? Solve for B and A 7. What is Regression Line if x =14 8. How much of y is unexplained?

  • REGRESSION ANALYSIS

    What is the least squares regression line equation? What are the slope and the y-intercept? What is the R-squared value?

  • Least squares regression: four questions

    210200 Four questions about a least squares regression line. 1. The least squares regression line given above is said to be a line which "best fits" the sample data.

  • Explained and Unexplained variation and the least-squares regression line

    123389 Explained and Unexplained variation and the least-squares regression line Bivariate data obtained for the paired variables x and y are shown below, in the table labelled "Sample data."

  • Regression Analysis duration of illness

    Find the least squares regression line duration of illness as the dependent variable, and bacterial count as the independent variable.

  • Regression analysis using BENEFITS column

    ) * Benefits Slope = -0.0967 and Intercept = 4.3672 R2 value is 0.009 3.

View More Related Solutions